ʻO nā papa polyethylene kēia no ka mea i kekahi manawa e ālai ai nā kaulahao molekala i kā lākou mau photocrystals, e waiho ana i kahi ʻāpana amorphous nui i loko o ka biomolecule, hiki i nā papa polyethylene ke omo i ka nui o ka ikehu kinetic hopena. Wahi a ka kuhikuhi, hoʻohana ʻia ke ʻano astm-D256 e hoʻoholo ai i ka hopena o ka waiwai ikaika compressive plastic. Wahi a ka hoʻohālikelike ʻana, hiki ke hoʻokaʻawale ʻia ka ikaika compressive o ka papa polyethylene i polycarbonate, ʻike ʻia ka polycarbonate no kona kūpaʻa i ka hopena, a hiki ke hoʻohana ʻia e like me nā huahana rubber maʻamau.
He haʻahaʻa loa ke kūpaʻa ʻana o ka papa polyethylene i ka friction. ʻOi aku ka maikaʻi o ke kūpaʻa ʻana o ka papa polyethylene, haʻahaʻa ke kūpaʻa friction a maikaʻi ka pulu ponoʻī. ʻO ia ka mea maka moeʻuhane o ka bushing, ka wili a me ka bushing. ʻO ke koho ʻana o ka papa polyethylene ma ke ʻano he hui friction, ʻaʻole wale nō e hiki ke hoʻomaikaʻi i ke ola lawelawe i hōʻino ʻia o nā hale hana, ka papa polyethylene a hiki ke mālama i nā kumuwaiwai.
He kūpaʻa kemika maikaʻi ko ka papa polyethylene. ʻOi aku ka maikaʻi o ke kūpaʻa kemika o ka papa polyethylene. Ma waho aʻe o ka waikawa nitric i hoʻopaʻa ʻia a me ka waikawa sulfuric, ʻaʻole maʻalahi ke kahakaha ʻia ka papa polyethylene i loko o kekahi hopena alkaline a acidic paha. Hiki ke hoʻohana ʻia e like me ka waikawa hydrochloric dilute ma 80 ℃, i loko o ka sodium cyanide & LT; Hydrochloric acid < 75% laumania, hiki ke hoʻohana ʻia me ka wai a me ka hoʻomaʻemaʻe wai. E like me ka ʻike o nā mea a pau, he maʻalahi loa ka pehu ʻana o ka papa polyethylene i loko o nā hydrocarbons aliphatic a i ʻole nā halogenates (ʻoi aku hoʻi i ka mahana kiʻekiʻe mau), no laila pono e uku ʻia ka nānā ʻana i kona hoʻohana ʻana.
E hoʻomaikaʻi i ke kūpaʻa ʻana o ka papa polyethylene. ʻO ke kūpaʻa kiʻekiʻe o ka ʻaʻahu kekahi o nā hiʻohiʻona hoʻowalewale, ʻo ka papa polyethylene i nā papahana he nui i ka hoʻohana ʻana i kahi waiwai hoʻohana koʻikoʻi. I kēia manawa, loaʻa i nā papa polyethylene plastik āpau ke kūpaʻa ʻana o ka ʻaʻahu maikaʻi, a ʻaʻole like ka nui o nā mea metala me ka maʻamau e like me ma mua. Me ka hoʻomaikaʻi ʻana o ke kaumaha molekala o ka polyethylene kaomi kiʻekiʻe, ua hoʻomaikaʻi ʻia ke kūpaʻa ʻana o kēia ʻano mea. Ke kūpaʻa hopena o ka papa polyethylene. Pili ka ikaika compressive o ka papa polyethylene i kona kaumaha molekala. Ke emi ke kaumaha molekala pili ma mua o 2 miliona, piʻi ka ikaika compressive hopena o ka papa polyethylene me ka hoʻonui ʻana o ke kaumaha molekala pili, a ʻo ke kumukūʻai kiʻekiʻe ma kahi o 2 miliona. I kēia manawa, e emi ana ka ikaika compressive hopena me ka hoʻonui ʻana o ke kaumaha molekala pili.
Ka manawa hoʻouna: Mei-31-2022
